Pencil lead writing utensil



p 1945- A. SCHWEITZER 2,372,914

PENCIL LEAD WRITING UTENSIL Fiied June 28, 1943 Patented Apr. 3, 1945 PENCIL LEAD WRITING UTENSIL Arnold Schweitzer, Geneva, Switzerland Application June 28, 1943, Serial No. 492,609 In Switzerland May 6, 1942 2 Claims.

The present invention refers to a pencil lead writing utensil which can be arranged, as per an example, either as a mechanical pencil, a lead holder, a pencil holder or also as a black lead or coloured lead pencil.

The wooden body of the black lead and of the coloured lead pencils which contains the lead is generally speaking, glossy or coated with colour, this latter rendering the outer surface polished like a mirror.

In the mechanical pencils, the lead holders or in the pencil holders made of metal or of whatever other matter, the surface in contact with the hand is also, in a general Way, glossy or, at least, provided with a superficial coating made only for an ornamental purpose.

The use of these writing utensils has however proved that the writing with them becomes difficult and this as well when the skin is moistened with perspiration as when the skin is very dry in the cold season. In both cases the fingers find no grip on the surface of the writing utensil and slip along it during the writing, with the result, that the hand is compelled to exert a very tiring forcible holding strain.

The various attempts to obviate to this inconvenience in providing the writing utensils with ribs or other parts projecting from their surface, including such serving as ornaments, have led to no result. In fact, in order that these projecting parts could operate satisfactionly they should be prominent enough, and in this case the writing utensil becomes unpleasant whereas its grasping produces a disagreeable feeling, because either the parts projecting from the surface penetrate into the fingers, or they are quite useless. This is more especially the case with ribbed surfaces of whatever kind.

The present invention has been made to the end of eliminating the above mentioned inconveniences by providing that the body containing the pencil lead shows a fine grained roughened part, at least at the very spots on which the fingers hold the utensil when writing.

In this way the mechanical pencil, the lead holder, the pencil or the pencil holder keep their general smooth surface. On the other hand the fine grained spots on which the fingers rest, provide a good grip and prevent the slipping without it being necessary to exert a forcible holding strain when writing.

The hereto attached drawing illustrates by way of an example an embodiment of some practical forms to be given to the present invention.

' In the drawing:

Figure 1 is a side elevation of a lead holder embodying the features of the present invention.

Figure 2 is a side elevation of a modified form of lead holder.

Figure -3 is a side elevation of a pencil embodying the improvements of the present invention.

Figs. 1 to 3 refer to a lead holder and to a pencil. According to Fig. 1 the part A of the lead holder is roughened out. It is not a sort of roughening which renders the surface uneven, but a roughening more similar to that of a very fine emery-cloth or that of an even rubber surface, or such as produced on a metal surface which has been submitted ton sandblast.

The roughening can be produced either on the blank metal or on the colour-coated surface as well.

According to Figure 2 the holder 2 of the-pencil 3 is also provided with a roughened top part A.

On a black lead or on a colour lead pencil 4 as shown on Fig. 3 the roughened surface can either be performed on part or extended on the whole length of the surface A, so that the adjacent surfaces 5 remain smooth, the smooth and roughened surfaces alternating about the periphery, or the whole surface may be roughened.

As an example, the roughening will be performed as follows on a metallic lead holder:

The parts of the holder which should be roughened out are subjected to a sand-blast.

Afterwards they are provided in the usual way with a colour coating. Thus the surface which has not been ground by the sand-blast remains glossy, whereas the parts subjected to the sand-blast show a fine grained rough surface.

The invented roughing can be produced on metal, on wood or on other materials as well.

I claim:

1. A method of forming non-slipping surfaces on writing implements which consists in subjecting the body 0; the implement to a sand-blasting operation to produce indiscriminately disposed pits and points, and subsequently rounding out the said points in the sand-blasted surface by coating the body and said sand-blasted surface with a skin-protecting film with a paint or lacquer.

2. A writing implement including an elongated metallic body or the like, a section of said body adjacent the writing end thereof having a roughened surface defined in the material of said body composed of indiscriminately disposed pits and points, and a coating for said roughened surface, whereby a non-slipping finger-gripping surface is provided with a flesh-protecting film over the said points of the said roughened ,body

section.

ARNOLD SCHWEITZER. 

